How to create and manage signatures in Apple Mail
A signature is automatically placed at the end of each e-mail message. Let's see how to create one.
1 Go to Mail... then click Preferences.
2 Select the Signatures tab.
3 To delete a signature, select it... then click the minus sign.
4 Clicking OK will permanently remove the signature. This cannot be undone.
5 Let's add a new signature by clicking the plus icon.
6 Give this signature a name... then click the right window pane and type to edit the signature.
7 It's possible to create different signatures for each e-mail address you have added to Mail instead of using the same one for all accounts. Click an account...
8 ... then add a new signature as we did in the last step.
9 Set the default signature to use for this account.
That's it! Now you know how to create and manage your signatures.